IF you don't want to spent major money, then just get either AUTOCAD or microstation. Use either program as a "brute force" drafting program. YES there are some "fancy" 3d piping programs, but in my experience most clients AREN'T building brand new facilities, where these types of programs could really shine. The clients I deal with are just "up-grading" and ONLY want to spend minimum money! With the AUTOCAD or microstation you can do basic drafting to generate any normally accepted construction drawing with minimum effort, something the 3d program users can't say. My $0.02 anyway! ...Mark